Linux has a handy tool for runing jobs on a schedule: cron. This is great for things like ensuring your webserver is up, especially in a shared environment like WebFaction where your server may periodically reboot.

If you try to add scripts to it that rely on your users $PATH, things will fail. Cron runs with its own, very limited path. To get around this, just echo $PATH and stuff the result at the top of your crontab entry